Methanethiol
[CAS# 74-93-1]

Identification

• Classification: API >> Antineoplastic agents >> Other antineoplastic agents
• Name: Methanethiol
• Synonyms: Mercaptomethane; Methyl mercaptan
• Molecular Formula: CH₄S
• Molecular Weight: 48.11
• CAS Registry Number: 74-93-1
• EC Number: 200-822-1

Properties

• Solubility: Sparingly soluble (20 g/L) (25 ºC), Calc.^*
• Density: 0.9600 g/cm³ (25 ºC)^**
• Melting point: 140.0-144.0 ºC^***
• Boiling point: 7.6 ºC^****
• Flash point: -49.0±19.5 ºC, Calc.^*

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2014 ACD/Labs)

^** "Hazardous Substances Data Bank" data were obtained from the National Library of Medicine (US)

^*** Kopp, Felix; Chemical Communications (Cambridge, United Kingdom) 2004, (20), P2288-2289.

^**** Konz, Wilhelm; US 3065260 1962.

Safety Data

• Hazard Symbols: GHS02;GHS04;GHS06;GHS09 Danger
• Hazard Statements: H220-H331-H400-H410

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Flammable gases	Flam. Gas	1	H220
Acute toxicity	Acute Tox.	3	H331
Acute hazardous to the aquatic environment	Aquatic Acute	1	H400
Chronic hazardous to the aquatic environment	Aquatic Chronic	1	H410
Gases under pressure (compressed)	Press. Gas (Comp.)		H280
Gases under pressure (liquid)	Press. Gas (Liq.)		H280
Flammable liquids	Flam. Liq.	1	H224